Writing The Digital Outputs Of Cpu - Fresenius Medical Care 4008 E Technical Manual

5.10 Writing the digital outputs of CPU II
Explanation:
UF Rate display:
CPU2: WR DIGIT. OUTP
Confirm
key
O: CPU2_WD_RES
Watchdog reset
IC 24/18
Preparation:
Set WD_SET (CPU2: WR DIGIT.
OUTP) to 0, then to 1 again.
Check:
Briefly set WD_RES to 0; upon reset to
1, the WD relay is connected.
O: CPU2_WD_SET
Watchdog set
IC 24/17
Watchdog relay drops out, 24 V
switched off, audible signal is sounded.
To clear the alarm, turn the machine
off and on again.
Otherwise calibration impossible.
O: CPU2_V24_EN
Release of V 24
IC 24/16
Preparation: V 24
Switch on (CPU1: WR DIGIT. OUTP).
Check: switch the valve on/off with
V 24_EN.
O: CPU2_V24B_EN
Release of V24b
IC 24/15
Preparation: switch on V 24B
(CPU1: WR DIGIT. OUTP).
Check: switch the valve on/off with
V 24B_EN.
0000 = not active
1111 = active (P.C.B. LP 632 level)
(can be changed with: 4008/E/B: UF Rate, 4008 H/S: +/–)
O: CPU2_UF_P_CTRL
Activation of UF pump
IC 24/14, 0/1 level change = 1 stroke
Preparation: set CPU2_UF_P_EN
to 1.
O: CPU2_UF_P_EN
Release of UF pumps
IC 24/13
O: CPU2_CPU2_ALARM
Release of the alarm tone by CPU II
IC 24/12
O: CPU2_UF_P2_CTRL
Activation of UF-Pump 2
IC 24/11, 0/1 level change = 1 stroke
Preparation: set CPU2_UF_P_EN
to 1.
O: CPU2_4066_ENABLE_1
Analog switch for P_ADS_DET
IC 20/13 (X632/A20)
O: CPU2_4066_ENABLE_2
Analog switch for +10-V reference volt-
age
IC 27/5
O: CPU2_4066_ENABLE_3
Analog switch for PV_DET
IC 20/6 (X632/C18)
Fresenius Medical Care 4008 4/08.03 (TM)
5-27